Multi-Channel Power Control

1. One or more non-transitory computer-readable media having instructions that, when executed by a processor of a mobile device, cause the mobile device to: set a power level of a transmission of a random access channel in the mobile device at a low value; set an occurrence threshold and an occurrence count for the random access channel, wherein the occurrence count and occurrence threshold related to a number of transmissions on the random access channel; increment the occurrence count when the mobile device transmits on the random access channel at the set power level; compare the occurrence count to the occurrence threshold; and set the power level of the random access channel transmission in the mobile device at a high value based on comparison of the occurrence count to the occurrence threshold.

2. The one or more non-transitory computer-readable media of claim 1 wherein the random access channel is a physical random access channel.

3. The one or more non-transitory computer-readable media of claim 1 wherein the random access channel is on a first carrier, and a second channel is on a second carrier.

4. The one or more non-transitory computer-readable media of claim 3 wherein the second channel is a physical uplink shared channel or a physical uplink control channel.

5. The one or more non-transitory computer-readable media of claim 3 wherein the random access channel and the second channel are powered by a single power amplifier of the mobile device.

6. The one or more non-transitory computer-readable media of claim 5 wherein the power amplifier has an available power level and the instructions, when executed, further cause the power amplifier, when the power level of the transmission is set at the low value, to: provide a first power level to transmissions of the second channel to fulfill a desired power allocation of the second channel; and provide a second power level to transmissions of the random access channel that is a difference between the first power level and the available power level.

7. The one or more non-transitory computer-readable media of claim 5 wherein the power amplifier has an available power level and the instructions, when executed, further cause the power amplifier, when the power level of the random access channel transmission is set at a high value, to: provide a first power level to transmissions of the random access channel to fulfill a desired power allocation of the random access channel; and provide a second power level to transmissions of the second channel that is a difference between the first power level and the available power level.

8. A mobile device comprising: a transmitter to transmit a first random access channel on a first carrier and a second random access channel on a second carrier; a processor to compare a first occurrence count to an occurrence threshold, wherein the occurrence count and occurrence threshold are related to a number of times a transmission has occurred at a low value on the first random access channel; and a power controller to set a power level of transmissions of the first random access channel on the first carrier at the low value, and change the power level of the transmissions of the first random access channel to a high value based on the comparison of the first occurrence count to the occurrence threshold.

9. The mobile device of claim 8 wherein the power level of the transmissions of the first random access channel is a first power level, and a power level of transmissions of the second random access channel is a second power level; and the processor is further to determine a second occurrence count for a transmission of the second random access channel and compare the second occurrence count to the occurrence threshold; and set the second power level at a low value and change the second power level to a high value based on the comparison of the second occurrence count to the occurrence threshold.

10. The mobile device of claim 9 wherein the first power level is higher than the second power level if the first occurrence count is higher than the second occurrence count.

11. The mobile device of claim 8 wherein the first random access channel is a physical random access channel.

12. The mobile device of claim 8 wherein the transmitter is further to transmit one or both of a physical uplink shared channel and a physical uplink control channel substantially simultaneously with the first random access channel.

13. The mobile device of claim 8 wherein the transmitter is to transmit the first random access channel substantially simultaneously with the second random access channel.

14. The mobile device of claim 8 wherein the processor is further to reset the first occurrence count to a minimal value based on a comparison of the first occurrence count to the occurrence threshold.